public static String getDateSerialToMinute(){  
        String receiptId = "";  
        Calendar cal = Calendar.getInstance();
        //cal.add(Calendar.MINUTE, -2);--减去两分钟
        receiptId += cal.get(Calendar.YEAR);  
        int month = (cal.get(Calendar.MONTH)+1);  
        if(month < 10){  
            receiptId += "0"+month;  
        }else{  
            receiptId += month;  
        }  
        int day = cal.get(Calendar.DATE);  
        if(day < 10){  
            receiptId += "0"+day;  
        }else{  
            receiptId += day;  
        }  
        int hour = cal.get(Calendar.HOUR_OF_DAY);  
        if(hour < 10){  
            receiptId += "0"+hour;  
        }else{  
            receiptId += hour;  
        }  
        int minute = cal.get(Calendar.MINUTE);  
        if(minute < 10){  
            receiptId += "0"+minute;  
        }else{  
            receiptId += minute;  
        }  
        return receiptId;  
    }